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High power high voltage lithium-ion cell

Inactive Publication Date: 2008-01-17
LITHDYNE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The principal object of the invention is to provide a lithium-ion cell that has both high power and high energy density.
[0011]A further object of the invention is to provide a lithium-ion cell that is simple and inexpensive to construct.
[0013]A further object of the invention is to provide a lithium-ion cell, which is durable and has long lasting service.

Problems solved by technology

Lithium cobalt phosphate has been tried as a cathode in lithium-ion cells coupled with anodes of graphite, MCMB, or lithium, however the cells failed due to the instability of the electrolyte, which oxidized due to the high voltage produced by the lithium cobalt phosphate cathodes.

Method used

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Embodiment Construction

[0018]When referring to the preferred embodiment, certain terminology will be utilized for the sake of clarity. Use of such terminology is intended to encompass not only the described embodiment, but also technical equivalents, which operate and function in substantially the same way to bring about the same result.

[0019]The lithium-ion cell of the invention can be of any desired configuration, in that it can be flat such as described in my prior U.S. patent application Ser. No. 11 / 378,973 or it can be wound, as is well known in the prior art.

[0020]The cell includes a first layer (not shown) which may be an anode with a porous current collector (not shown) embedded in the middle of its active material and with a terminal (not shown) extending therefrom. The anode includes lithiated titanium spinel (Li4Ti5012), which anode material may be produced by the method as disclosed in U.S. Pat. No. 5,766,796 wherein the anode consists of lithiated titanium spinel, preferably of nano-sized par...

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PUM

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Abstract

A high power high voltage lithium-ion cell, which includes an anode of lithium titanate (Li4Ti5012), a cathode of lithium cobalt phosphate (LiCoPO4), and a non-aqueous liquid electrolyte. Both the anode and the cathode materials are preferably of nano-sized particles.

Description

CROSS REFERENCE TO RELATED DOCUMENTS[0001]The subject matter of this invention is shown and described in the disclosure document of Joseph B. Kejha, document no. 557,375 filed Jul. 19, 2004, and entitled “High Power Lithium-ion Cell Having High Voltage”.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to a high power high voltage lithium-ion cell, which is of the type that has a lithium titanate (Li4 Ti5012) anode, a liquid electrolyte, and a lithium cobalt phosphate (LiCoPO4) cathode.[0004]2. Description of the Prior Art[0005]It is well known in the prior art that lithium titanate (Li4Ti5012) has excellent high rate capabilities (power), when used in lithium-ion batteries or in asymmetric capacitors. U.S. Pat. No. 5,766,796 discusses the use of lithium titanate as an anode, with a solid polymer electrolyte, and various cathodes, such as LiMn204, LiCo02, LiNi02 and LiV205 and their derivates. All of these electrochemical couples have a lower vol...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/58H01M10/40H01M4/02H01M4/131H01M4/136H01M4/485H01M10/0525H01M10/0569H01M10/36
CPCH01M4/131H01M4/136H01M4/485H01M4/5825Y02T10/7011H01M10/0569H01M2004/021Y02E60/122H01M10/0525Y02E60/10Y02T10/70
Inventor KEJHA, JOSEPH B.
Owner LITHDYNE
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